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California R•oval Water Quality Control Board <br /> Central Valley Region <br /> Winston H.Hickox Robert Schneider,Chair <br /> SecretaryJor Gray Davis <br /> Environmental Sacramento Main Office Governor <br /> Protection Internet Address: httP://www.swrcb.ca.gov/rw c65 M(��p <br /> 3443 Routier Road,Suite A,Sacramento,Califomia 95827-3003 L(�L� V L'�D <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> 13 January 2003 JAN 14 2003 <br /> ENVIRONMENT HEALTH <br /> Mr. Iry Jenkins PERMIT/SERVICES <br /> Shell Oil Products Company <br /> P.O. Box 2463 <br /> Houston, TX 77252 <br /> REVIEW OF INVESTIGATION REPORT, FORMER SHELL CENTRAL VALLEY <br /> CRUDE OIL PIPELINES—HANSEN ROAD,TRACY, SAN JOAQUIN COUNTY <br /> We have reviewed the 2 January 2003 Investigation Report(Report) submitted by Clayton Group <br /> Services on behalf of Shell Oil Products Company(Shell) for the former Shell Central Valley <br /> Crude Oil Pipeline near the intersection of Hansen and Schultes Roads in Tracy. The Report <br /> discusses the soil and grab groundwater results from 13 borings advanced to delineate the lateral <br /> extent of petroleum pollution found during pipeline removal activities. The boring logs included <br /> in the Report do not include organic vapor readings. Future investigative work must include <br /> organic vapor readings of the soil samples to ensure the safety of the workers. <br /> Based on the results presented in the Report, the lateral extent is defined to low concentrations of <br /> total petroleum hydrocarbons as diesel and crude oil in soil and to detections below the taste and <br /> odor threshold in groundwater. However, the vertical extent of petroleum hydrocarbons is not <br /> defined. Therefore,by 12 March 2003, please submit a work plan to define the vertical extent of <br /> petroleum hydrocarbons and to remediate soil and groundwater pollution. If you have any <br /> questions,please feel free to contact me at(916) 255-3119 or by email at <br /> lewisd@rb5s.swreb.ca.gov. <br /> DEVRA LEWIS <br /> Environmental Scientist <br /> cc: Mr. Michael Infurna, San Joaquin County Environmental Health Department, Stockton <br /> Mr. Michael Hurd, Clayton Group Services, Pleasanton <br /> California Environmental Protection Agency <br /> rta Recycled Paper <br /> The energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption. <br /> For a list of simple ways you can reduce demand and cut your energy costs,see our Web-site at http://www.swrcb.ca.gov/rwgcb5 <br />